Cloud Computing and Security 4th International Conference, ICCCS 2018, Haikou, China, June 8-10, 2018, Revised Selected Papers, Part II - Sun, Xingming; Sun, Xingming; Pan, Zhaoqing; Pan, Zhaoqing; Bertino, Elisa; Bertino, Elisa (Springer International Publishing : Imprint: Springer, 2018)